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rezolva ecuatia:5(14+b)=170

Răspuns :

[tex]\displaystyle 5(14+b)=170 \\ 70+5b=170 \\ 5b=170-70 \\ 5b=100 \\ b= \frac{100}{5} \\ b=20[/tex]
5•(14+b)=170
14+b=170:5
14+b=34
b=34-14
b=20